August nicolaus



(No Model.)

A. NIGOLAUS. THERMOMETER FOR SAD IRONS.

No. 448,066. Patented Mar. 10,1891.

WITNESSES:

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Mrs" Starts Fries.

AUGUST NICOLAUS, OF NEW YORK, N. Y., ASSIGNOR OF 'lWVO- THIRD S TO HERMAN KAHN AND SAMUEL J. BESTHO'FF, OF SAME PLACE.

THERMOMETER FOR SAD-IRONS.

SPECIFICATION forming part of Letters Patent No. 448,066, dated March 10, 1891.

Application filed September 10, 1890. Serial No. 364,532. (No model.)

To aZZ whom it may concern:

Be it known that 1-, AUGUST NIOOLAUS, of New York city, in the county and State of New York, have invented a new and useful Improvement in Sad-Irons, of which the following is a full, clear, and exact description.

My invention relates to an improvement in sad-irons, and has for its object to provide a means whereby it may be observed ata glance whether the iron is sufficiently heated or cold or heated to too great an extent for proper work.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims.

Reference is to be had to the accompanying drawings, forminga part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the improved sad-iron. Fig. 2 is a central longitudinal section, taken 011 line 3 'y of Fig. 3, and Fig. 3 is a central vertical section taken on line as so of Fig. 2. v

The body of the iron 10 may be of anysuitable or approved construction and may be made of one or more parts, the body 10 being provided with any approved form of handle 11.-

Upon the upper surface of the body 10 of the iron a dial 12 is centrally pivoted, which dial is preferably of disk form, and is provided near its periphery with an indicator or pointer 13,which indicator or pointer 13 preferably consists of a piece of suitably-shaped brass or other bright metal, the bright metal being employed when the disk is of a dark color; but should the disk be nickel-plated, for instance,a darkened piece of metal is employed thereon as an indicator.

In front of the disk 12 alongitudinal recess 1-1 is produced in the body, which recess extends some distance beneath the dial, and the dial forms a portion of the cover of said recess, the cover for the remaining portion con sisting of a metal plate 15 or its equivalent,

attached to the body in any suitable or approved manner.

In the recess 14 a thermostatic bar or strip A 1s located, which bar or strip is preferably 'of fastening devices.

made in two sections a and a, united at one end. Each section consists of two pieces of metal of unequal expansion, the inner piece of metal being preferably of @rass and the outer one of steel, and the two metals comprising the sections are bolted together by bolts or pins 15" or any other equivalent form The free end of the said section a is made to enter a channel 16, produced in one end wall of the recess 14, which channel is of sufficient width to just receive the section. The corresponding end of the opposite member or section a is provided with an attached loop 17, made preferably of steel, through which loop a pin 18 extends, the said pin being attached to the under face of the dial 12.

A second pointer or indicator 19 is placed upon the cover-strip 15 of the recess 14, and upon the said strip the word Right is usually produced, and upon the body at the sides of the strip the words Gold and Too hot are produced, or the equivalents of the said words may be employed.

hen the iron is cold the pointer upon the dial 12 is opposite the Word Cold. hen the iron is placed upon the fire and is heated to a proper degree for successful ironing, the brass of the thermostatic strip or bar will have been expanded suffieiently to force the member a. to move laterally and thereby partially revolve the dial 12, the dial being revolved just a sufficient distance to cause its pointer 13 to register with the pointer 19 upon the body, at the rear of which pointer the Word Rightappears. \Vhen, however, the iron has become too hot for proper use, the pointer upon the dial will be carried by the revolution of the latter a sufficient distance over to indicate Too hot.

It will be observed that an iron provided with the improvements above set forth enables an. operator to quickly determine whether or not ithas been sufficiently heated and whether it is too hot for use.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, in a sad-iron, with the movable pointer, of the thermostat-bar formed in two parallel sections secured together at one end and each section being formed of two strips of unequal expansion, the free end of one section extending adjacent to and connected with the pointer and the correspondin g end of the otherseciion being secured to the sad-iron, whereby when heated the bar will flex and operate the pointer, substantially as set forth.

2. The combination,with the sad-iron having in its upper face a recess 14, provided with a narrow channel 10 in one end wall, of a thermostat-bar formed of metallic strips of unequal expansion, said bar comprising two parallel sections a a, connected at one end, the opposite end of the section Ct being held in said channel 16, and a pivoted pointer above the-free end of the section a and connected therewith, substantially as set forth.

AUGUST NICOLA-US.

Witnesses:

BENJAMIN FRANKLIN, J. FRED. ACKER. 

